I read java file using FileReader that contains some method. How i can read method scope (method area inside) to find duplicate variable?
For example, this is a java file that i read:
public double[] copyArray(double[] data) {
int _nn = data.length;
double[] _tmp = new double[_nn];
System.arraycopy(data, 0, _tmp, 0, _nn);
int _nn;
_nn = tmp;
return _tmp;
}
How to know method scope?, i mean between { and }, if scope has found, find duplicate variable such as example above (int _nn) duplicated.
[addition] i have tried using java parser, then is success. Then i should send the results using list, but only last method in the list. What's wrong with my code?
This is a MethodVisitor:
private static class MethodVisitor extends VoidVisitorAdapter {
private List<String> list = new ArrayList<String>();
@Override
public void visit(MethodDeclaration n, Object file) {
list.add(n.getName());
}
public List<String> getList() {
return list;
}
}
Then, this is a method to call MethodVisitor:
private MethodVisitor mv;
public void doIt(File file) throws Exception {
CompilationUnit cu;
try {
// parse the file
cu = JavaParser.parse(file);
} finally {
//file.close();
}
// visit and print the methods names
mv = new MethodVisitor();
mv.visit(cu, file);
List<String> list = mv.getList();
for(String item:list){
System.out.println(item);
}
}
